| Nurse practitioner | 355 |
| Internal medicine | 128 |
| Physician assistant | 105 |
| Family practice | 83 |
| Emergency medicine | 73 |
| Certified Registered Nurse Anesthetist (CRNA) | 65 |
| Anesthesiology | 50 |
| General practice | 47 |
| Diagnostic Radiology | 46 |
| Licensed clinical social worker | 41 |
| Physical therapist (private practice) | 39 |
| Centralized Flu | 38 |
| Optometrist | 38 |
| Obstetrics/gynecology | 38 |
| Chiropractic | 29 |
| General surgery | 28 |
| Mental Health Counselors | 27 |
| Psychiatry | 23 |
| Neurology | 21 |
| Podiatry | 20 |
| Ophthalmology | 19 |
| Hospitalist | 19 |
| Mass Immunization Roster Billers | 19 |
| Orthopedic surgery | 18 |
| Clinical psychologist | 17 |
| Critical care (intensivists) | 17 |
| Cardiology | 16 |
| Occupational therapist (private practice) | 14 |
| Pulmonary disease | 13 |
| Gastroenterology | 12 |
| Pediatric medicine | 12 |
| Infectious disease | 12 |
| Otolaryngology | 11 |
| Urology | 10 |
| Pharmacy | 9 |
| Audiologist (billing independently) | 9 |
| Physical medicine and rehabilitation | 9 |
| Dermatology | 8 |
| Nephrology | 8 |
| Ambulatory Surgical Center | 7 |
| Pathology | 7 |
| Interventional Pain Management (IPM) | 6 |
| Vascular surgery | 6 |
| Endocrinology | 6 |
| Speech / language pathology | 6 |
| Rheumatology | 6 |
| Radiation oncology | 6 |
| Interventional Cardiology | 6 |
| Certified nurse midwife | 6 |
| Interventional radiology | 5 |
| Thoracic surgery | 4 |
| Sports Medicine | 4 |
| Surgical oncology | 4 |
| Anesthesiologist Assistant | 4 |
| Neurosurgery | 4 |
| Pain Management | 4 |
| Hand surgery | 3 |
| Medical oncology | 3 |
| Ambulance Service Supplier, e.g., private ambulance companies, funeral homes | 3 |
| Gynecologist/oncologist | 3 |
| Micrographic Dermatologic Surgery | 3 |
| Hematology/oncology | 3 |
| Allergy/immunology | 2 |
| Marriage and Family Therapist | 2 |
| Plastic and reconstructive surgery | 2 |
| Hematology | 1 |
| Cardiac Electrophysiology | 1 |
| Cardiac surgery | 1 |
| Psychologist (billing independently) | 1 |
| Opioid Treatment Program | 1 |
| Geriatric medicine | 1 |
| Independent Diagnostic Testing Facility (IDTF) | 1 |
| Clinical Laboratory (Billing Independently) | 1 |
| Osteopathic manipulative therapy | 1 |